Sigma 120-400mm f/4.5-5.6 DG APO OS HSM Nikon

The Sigma 120-400mm f/4.5-5.6 DG APO OS HSM is interesting for its longer focal lengths, equivalent to a 180-600mm on a Nikon DX body (and slightly more on a Canon APS-C). On a full-frame camera, it achieved a respectable DxOMark score of 15.8 though it dropped to just 11 on a Nikon D7000 (a slightly higher than on a D300s). Highpoints, apart from the extra reach, include consistent resolution across the image field (the Acutance map above shows the lens at 400mm), as well as good control of chromatic aberration, while the disadvantage of vignetting at maximum aperture is really only an issue for FF bodies. While not as pricey as some, $1,000 is still a sizeable figure given the performance at 400mm.

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With the vagaries of photographing wildlife, the flexibility of a telephoto zoom would appear to be an attractive solution. However, image quality is often a compromise at the maximum aperture and longest focal length, typically the most crucial settings. We’ve pulled some lens data from our database and put together a round up of popular zoom lenses over the years (and made some comparisons with high performance primes). Read on to find out which models have the best image quality.

Sigma 120-400mm F4.5-5.6 DG APO OS HSM

lens reviews

How come that some lenses such as the Sigma 120-400mm, launched in 2008, still are not reviewed and do not appear in the lens rating chart while, in the same time, recently launched lenses are already reviewed?